321435556313 has 4 divisors (see below), whose sum is σ = 322686278580. Its totient is φ = 320184834048.

The previous prime is 321435556307. The next prime is 321435556319. The reversal of 321435556313 is 313655534123.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 313655534123 = 773 ⋅405763951.

It is an interprime number because it is at equal distance from previous prime (321435556307) and next prime (321435556319).

It can be written as a sum of positive squares in 2 ways, for example, as 293907105424 + 27528450889 = 542132^2 + 165917^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-321435556313 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (321435556319) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 625360748 + ... + 625361261.

It is an arithmetic number, because the mean of its divisors is an integer number (80671569645).

Almost surely, 2^321435556313 is an apocalyptic number.

It is an amenable number.

321435556313 is a deficient number, since it is larger than the sum of its proper divisors (1250722267).

321435556313 is a wasteful number, since it uses less digits than its factorization.

321435556313 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1250722266.

The product of its digits is 486000, while the sum is 41.

The spelling of 321435556313 in words is "three hundred twenty-one billion, four hundred thirty-five million, five hundred fifty-six thousand, three hundred thirteen".